88,566 results match your criteria Inorganic chemistry[Journal]


Synthesis and evaluation of HfO2 as a prospective filler in inorganic-organic hybrid membranes based on Nafion for PEM fuel cells.

Nanotechnology 2018 Dec 11. Epub 2018 Dec 11.

SCIENCE, Centro de Investigacion y Desarrollo Tecnologico en Electroquimica SC, Pedro Escobedo, 76703, MEXICO.

Hybrid inorganic-organic Nafion membranes modified with metal oxides (typically TiO<sub>2</sub>, ZrO<sub>2</sub>, WO<sub>3</sub>) are a good alternative for fuel cells applications. However, one of their main limitations is associated with their relative low proton conductivity at temperatures above 80°C. In this work, we overcome this issue using HfO<sub>2</sub> as a filler. Read More

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December 2018

Elevated arsenic exposure and efficient arsenic metabolism in indigenous women around Lake Poopó, Bolivia.

Sci Total Environ 2018 Dec 2;657:179-186. Epub 2018 Dec 2.

Hydrosciences Montpellier, Institut de Recherche pour le Développement, CNRS, University of Montpellier, France.

Elevated concentrations of inorganic arsenic, one of the most potent environmental toxicants and carcinogens, have been detected in well water around Lake Poopó, Bolivia. This study aimed to assess human exposure to arsenic in villages around Lake Poopó, and also to elucidate whether the metabolism and detoxification of arsenic in this population is as efficient as previously indicated in other Andean areas. We recruited 201 women from 10 villages around Lake Poopó. Read More

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December 2018

Sol gel synthesis of hybrid chitosan/calcium aluminosilicate nanocomposite membranes and its application as support for CO sensor.

Int J Biol Macromol 2018 Dec 8. Epub 2018 Dec 8.

Inorganic Chemistry Department, National Research Centre, El-Buhouth St., Dokki, Giza 12622, Egypt; Packaging Materials Department, National Research Centre, El-Bohouth St., Dokki, Giza 12622, Egypt. Electronic address:

Modification of chitosan with cross-linkers, blends with various kinds of polymers, nanoparticles and new organic-inorganic hybrid composites in order to obtain some improved properties attached more attention nowadays due to their good sensitivity in changing electrical and optical properties. In the current work modified hybrid chitosan/calcium aluminosilicate (CH/CAS) nanocomposite membranes and doped with (3, 5 & 7 mol%) AlO nanoparticles were synthesized via sol-gel process in acidic conditions, which can be efficiently employed to capture CO gas at lower and moderate temperatures. Furthermore, the fabricated CH/CAS nanocomposite membrane loading with (3, 5 & 7 mol%) AlO were investigated using XRD, SEM, FTIR and dielectric measurements. Read More

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December 2018

Borylated N-heterocyclic carbenes: rearrangement and chemical trapping.

Chemistry 2018 Dec 11. Epub 2018 Dec 11.

UNITED KINGDOM.

This study details attempts to access N-heterocyclic carbenes (NHCs) featuring the diazaborolyl group, {(HCNDipp)2B}, as one or both of the N-bound substituents. Attempts to isolate N-heterocyclic carbenes based around imidazolylidene or related heterocycles, are characterized by facile N-to-C migration of the boryl substituent. In the cases of imidazolium precursors bearing one N-bound diazaboryl group and one methyl substituent, deprotonation leads to the generation of the target carbenes, which can be characterized in situ by NMR measurements, and trapped by reactions with metal fragments and elemental selenium. Read More

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December 2018

Reduction of carbon oxides by an acyclic silylene: reductive coupling of CO.

Angew Chem Int Ed Engl 2018 Dec 7. Epub 2018 Dec 7.

University of Oxford, Chemistry, Inorganic Chemistry Laboratory, South Parks Road, SN77RR, Oxford, UNITED KINGDOM.

The reactions of a boryl-substituted acyclic silylene with carbon dioxide and monoxide are reported. The former proceeds via oxygen atom abstraction, generating CO (with rearrangement of the putative silanone product via silyl group transfer). The latter is characterized by reductive coupling of CO to give an ethynediolate fragment which inserts into the Si-B bond. Read More

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December 2018

Board-like Fused-Thiophene Liquid Crystals and Their Benzene Analogues: Facile Synthesis, Self-assembly, p-Type Semiconductivity, and Photoluminescence.

Chem Asian J 2018 Dec 10. Epub 2018 Dec 10.

CNRS-University de Strasbourg, Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), Strasbourg, FRANCE.

Novel fused-thiophene discotic liquid crystals were designed and easily synthesized by Suzuki coupling and FeCl3 oxidized tandem cyclo-dehydrogenation reactions, including homo- and cross-coupling reactions. The resulting hexagonal and rectangular columnar mesomorphic supramolecular structures formed were characterized by polarizing optical microscopy, differential scanning calorimetry, and small-angle X-ray scattering. Charge carrier transport properties in the mesophases of two of the synthesized fused-thiophene discogens were measured by transient photocurrent time-of-flight (TOF) technique, revealing fast hole transport values in the range of 10-3 to 10-2 cm2 V-1s-1, thus demonstrating potential applications in electronic devices. Read More

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December 2018

Cis-trans proline isomers in the catalytic domain of calcineurin.

FEBS J 2018 Dec 7. Epub 2018 Dec 7.

BioNMR Laboratory, Inorganic and Organic Chemistry Department, University of Barcelona, Baldiri Reixac 10-12, 08028, Barcelona, Spain.

Calcineurin is an essential calcium activated serine/threonine phosphatase. The six NMR-observable methionine methyl groups in the catalytic domain of human calcineurin Aα (CNA) were assigned and used as reporters of the presence of potential cis-trans isomers in solution. Proline 84 is found in the cis conformation in most calcineurin X-ray structures, and proline 309, which is part of a highly conserved motif in phosphoprotein phosphatases, was modeled with a cis-peptide bond in one of the two molecules present in the asymmetric unit of CNA. Read More

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December 2018
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Silicon tris(perchloro)dioxolene: a neutral triplet diradical.

Angew Chem Int Ed Engl 2018 Dec 10. Epub 2018 Dec 10.

Ruprecht Karls Universitat Heidelberg Fakultät für Chemie und Geowissenschaften, Inorganic Chemistry Departement, Institut für Anorganische Chemie, Im Neuenheimer Feld 270, 69120, Heidelberg, GERMANY.

The reaction of ortho-quinone with silicon tetraiodide leads to neutral silicon trisdioxolenes in high yield - delivering the unknown oxidized form of triscatecholatosilicate dianions and the first example of open shell semiquinonates connected via a single non-metal center. Silicon tris(perchloro)dioxolene is a stable diradical with a triplet ground state, as supported by X-ray diffraction, IR-, resonance Raman, UV/Vis-, (VT)EPR-spectroscopy and Kohn-Sham broken symmetry computations. Preliminary results suggest that the preferred magnetic ground state can be altered by choice of the substituents. Read More

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December 2018

Cross-infection control in clinical training: Development of a device for storing a composite resin in restorative dentistry.

Microsc Res Tech 2018 Oct;81(10):1087-1094

Department of Social Dentistry, Araraquara School of Dentistry, University of Sao Paulo State, São Paulo, Brazil.

This study presented a biosafety device for the hygienic storage of composite resin during restorative procedures in teaching clinics, RESTAURASAFE, and to compare the color stability, surface hardness, and degree of conversion of the composite resin made with the proposed device to those of conventionally made resins. Esthet-X HD composite was manipulated directly from the syringe, fractionated doses, dappen dish or RESTAURASAFE. Disc-shaped specimens were immersed in artificial saliva and coffee for 60 days and the color stability and the Vickers surface hardness were evaluated during 60 days. Read More

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October 2018

Pharmacological activation of dimethylarginine dimethylaminohydrolase (DDAH) activity by inorganic nitrate and DDAH inhibition by N-hydroxy-L-arginine, N,N-dimethyl-L-citrulline and N,N-dimethyl-N-hydroxy-L-citrulline: results and overview.

Amino Acids 2018 Dec 8. Epub 2018 Dec 8.

Institute of Toxicology, Core Unit Proteomics, Hannover Medical School, Carl-Neuberg-Strasse 1, 30625, Hannover, Germany.

Asymmetric dimethylarginine (ADMA) and symmetric dimethylarginine (SDMA) are endogenous inhibitors of nitric oxide (NO) synthase. SDMA is excreted in the urine without major metabolization. About 10% of daily produced ADMA are excreted unchanged in the urine. Read More

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December 2018

Amperometric sensing of nitrite at nanomolar concentrations by using carboxylated multiwalled carbon nanotubes modified with titanium nitride nanoparticles.

Mikrochim Acta 2018 Dec 10;186(1). Epub 2018 Dec 10.

Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei, 106, Taiwan, Republic of China.

A glassy carbon electrode (GCE) was modified with a nanocomposite prepared from carboxylated multiwalled carbon nanotubes (c-MWCNT) and titanium nitride (TiN) nanoparticles to obtain a sensor for nitrite. The nanocomposite was characterized by transmission electron microscopy, elemental mapping, X-ray diffraction, and Raman spectroscopy. Electrochemical studies results show the modified GCE to possess a low electrochemical resistance (Rct = 7 Ω) and a large electroactive surface (A = 0. Read More

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December 2018
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Composts as alternative to inorganic fertilization for cereal crops.

Environ Sci Pollut Res Int 2018 Dec 8. Epub 2018 Dec 8.

Centro de Edafología y Biología Aplicada del Segura, Consejo Superior de Investigaciones Científicas (CEBAS-CSIC), Campus Universitario de Espinardo, Edificio no. 25, P.O. Box 164, 30100, Espinardo, Murcia, Spain.

The use of treated organic products as fertilizers and soil amendments not only results in economic benefits for the small-scale farmer, but it also reduces pollution due to reduced nutrient run-off and N leaching. In this work, the feasibility of using composts as fertilizers and soil improvers has been evaluated at the field level, in barley and soft wheat crops (two successive cultivations of each crop). The applied treatments consisted of two commercial composts (compost manure and sewage sludge compost) added to the soil either alone (T1 and T3) or in combination with inorganic fertilizers (T2 and T4) and a conventional mineral fertilization (T5). Read More

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December 2018

Substrates and inhibitors of phosphate transporters: from experimental tools to pathophysiological relevance.

Pflugers Arch 2018 Dec 7. Epub 2018 Dec 7.

Department of Toxicology, Veterinary Faculty, University of Zaragoza, Calle Miguel Servet, 177, E50013, Zaragoza, Spain.

The control of inorganic phosphate homeostasis is mediated through the activity of sodium-coupled Pi transporters located in the intestine, kidneys, and bone. To study these transporters in either the native tissue or after heterologous expression, it is very important to use specific inhibitors of the studied transporter, in order to know the corresponding relevance in the total Pi uptake and to differentiate from the activity of other transporters. Inhibitors are also necessary as drugs for treating Pi homeostasis disorders. Read More

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December 2018

Modeling Retention Behavior on Analysis of Hallucinogenic Mushrooms Using Hydrophilic Interaction Liquid Chromatography.

J Chromatogr Sci 2018 Dec 7. Epub 2018 Dec 7.

Department of Drug and Arson Investigation, Hungarian Institute for Forensic Sciences, Mosonyi Street 9, Budapest, Hungary.

The goal of this work was to investigate and compare the selectivity of three different hydrophilic interaction liquid chromatography (HILIC) charge modulated amide columns, iHILIC®-Fusion, iHILIC®-Fusion(+) and iHILIC®-Fusion(P), for analysis of compounds in hallucinogen mushrooms. An extract of a truffle-like fungus containing psilocin, psilocybin and baeocystin was chosen as test material. Three different modeling methods were applied to describe the retention times of constituents in isocratic separation mode as a function of mobile phase composition, pH and temperature. Read More

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December 2018

Differences in phosphatemia and frequency of consumption of dietary sources of phosphorus in hemodialysis patients in southern and northern Brazil.

J Bras Nefrol 2018 Sep 21. Epub 2018 Sep 21.

Fundação Pró-Rim, Joinville, SC, Brasil.

Introduction: Hyperphosphatemia is associated with unfavorable outcomes, and the percentage of patients presenting with this condition in hemodialysis (HD) in kidney foundation units in the state of Santa Catarina (SC) is historically higher than that of patients in the state of Tocantins (TO).

Objective: To assess the frequency of consumption of the main dietary sources of phosphorus and to compare them between the two states.

Methodology: A cross-sectional study was carried out involving 123 patients, 66 of SC and 57 of TO: 52% were men, average age was 46. Read More

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September 2018

Surfactant-assisted synthesis and electrochemical properties of an unprecedented polyoxometalate-based metal-organic nanocaged framework.

Chem Commun (Camb) 2018 Dec 10. Epub 2018 Dec 10.

Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, Department of Chemistry, University of Science and Technology Beijing, Beijing 100083, China.

The first polyoxometalate (POM)-containing nanocage based metal-organic framework (Zn-POMCF) was synthesized by a surfactant-assisted method. In contrast to the Zn-based metal-organic framework (Zn-MOF), the cooperative assembly of POM and a Zn/trz macrocycle gave rise to high stability and good electrochemical ability of the Zn-POMCF in lithium-ion batteries (LIBs). Read More

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December 2018
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Synthesis of novel luminescent copper nanoclusters with substituent driven self-assembly and aggregation induced emission (AIE).

Chem Commun (Camb) 2018 Dec 11. Epub 2018 Dec 11.

Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore-560012, India.

We demonstrate a novel strategy to synthesize highly stable luminescent mercaptoimidazole-capped copper nanoclusters (CuNCs). Herein we depict that a simple modification of substituents on the mercaptoimidazole ligand dictates the self-assembly and photophysical properties of the clusters. These CuNCs showed aggregation induced emission (AIE) with a large Stokes shift (Δλ > 200 nm), and the formation of clusters corresponding to Cu4L3 was confirmed by MALDI-TOF mass spectrometric analyses. Read More

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December 2018

Sodium nitrite potentiates antimicrobial photodynamic inactivation: possible involvement of peroxynitrate.

Photochem Photobiol Sci 2018 Dec 11. Epub 2018 Dec 11.

Wellman Center for Photomedicine, Massachusetts General Hospital, Boston, MA 02114, USA. and Department of Dermatology, Harvard Medical School, Boston, MA 02115, USA and Harvard-MIT Division of Health Sciences and Technology, Cambridge, MA 02139, USA.

We have recently shown that a wide range of different inorganic salts can potentiate antimicrobial photodynamic inactivation (aPDI) and TiO2-mediated antimicrobial photocatalysis. Potentiation has been shown with azide, bromide, thiocyanate, selenocyanate, and most strongly, with iodide. Here we show that sodium nitrite can also potentiate broad-spectrum aPDI killing of Gram-positive MRSA and Gram-negative Escherichia coli bacteria. Read More

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December 2018

Excited state C-N bond dissociation and cyclization of tri-aryl amine-based OLED materials: a theoretical investigation.

Phys Chem Chem Phys 2018 Dec 10. Epub 2018 Dec 10.

Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India.

Tri-aryl amines (TAA) such as triphenylamine (TPA) are widely used for designing chromophores for dye-sensitized solar cells (DSSC) and organic light-emitting diodes (OLED). These materials degrade over time and hence result in reduced performance. Therefore, exploring the associated mechanistic pathways and factors controlling the degradation is necessary for future development of durable TAA-based devices. Read More

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December 2018

In situ structural evolution of single particle model catalysts under ambient pressure reaction conditions.

Nanoscale 2018 Dec 11. Epub 2018 Dec 11.

Aix Marseille Université, CNRS, Université de Toulon, IM2NP UMR 7334, 13397, Marseille, France. and ID01/ESRF, 6 rue Jules Horowitz, BP220, F-38043 Grenoble Cedex, France.

The catalytic activity of metal nanoparticles can be altered by applying strain, which changes the crystalline lattice spacing and modifies the electronic properties of the metal. Understanding the role of elastic strain during catalytic reactions is thus crucial for catalyst design. Here, we show how single highly faceted Pt nanoparticles expand or contract upon interaction with different gas atmospheres using in situ nano-focused coherent X-ray diffraction imaging. Read More

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December 2018

Oxidation of a phosphinidene oxide: formation of a dioxaphosphirane oxide with oxygen scrambling.

Chem Commun (Camb) 2018 Dec 10. Epub 2018 Dec 10.

College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, China.

The oxidation of a prototypical phosphinidene oxide FP[double bond, length as m-dash]O has been studied in O2-doped Ar and N2 matrices at 10 K. Upon 266 nm laser irradiation, FP[double bond, length as m-dash]O combines with O2 and yields the cyclic peroxide, dioxaphosphirane oxide FP([double bond, length as m-dash]O)(O2). Unexpected oxygen scrambling occurs during the oxygenation as evidenced by the observation of a 1 : 2 mixture of FP([double bond, length as m-dash]16O)(18O18O) and FP([double bond, length as m-dash]18O)(16O18O) when 18O2 was used. Read More

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December 2018

Porous metal oxides derived from Cu-Al layered double hydroxide as an efficient heterogeneous catalyst for the Friedel-Crafts alkylation of indoles with benzaldehydes under microwave irradiation.

Heliyon 2018 Nov 24;4(11):e00966. Epub 2018 Nov 24.

Department of Organic Chemistry, Faculty of Chemistry, University of Science, Viet Nam National University, Ho Chi Minh City, 721337, Viet Nam.

Four Cu-Mg-Al mixed metal oxides (MMO) were synthesized through the calcination of layered double hydroxides (LDHs). These catalysts were fully characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), Brunauer-Emmett-Teller surface area (BET), and inductively coupled plasma optical emission spectrometer (ICP-OES). The catalytic efficiency of porous metal oxides derived from LDHs has been tested successfully for the synthesis of bis(indolyl)methanes the Friedel-Crafts alkylation of indoles with aromatic aldehydes under solvent-free microwave irradiation. Read More

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November 2018

Microbially Mediated Hydrogen Cycling in Deep-Sea Hydrothermal Vents.

Front Microbiol 2018 23;9:2873. Epub 2018 Nov 23.

Geomicrobiology, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany.

Deep-sea hydrothermal vents may provide one of the largest reservoirs on Earth for hydrogen-oxidizing microorganisms. Depending on the type of geological setting, hydrothermal environments can be considerably enriched in hydrogen (up to millimolar concentrations). As hot, reduced hydrothermal fluids ascend to the seafloor they mix with entrained cold, oxygenated seawater, forming thermal and chemical gradients along their fluid pathways. Read More

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November 2018

Enzymatic and non-enzymatic pathways of kynurenines' dimerization: the molecular factors for oxidative stress development.

PLoS Comput Biol 2018 Dec 10;14(12):e1006672. Epub 2018 Dec 10.

Laboratory of Neurogenetics, Pavlov Institute of Physiology, Russian Academy of Sciences, Saint-Petersburg, Russia.

Kynurenines, the products of tryptophan oxidative degradation, are involved in multiple neuropathologies, such as Huntington's chorea, Parkinson's disease, senile dementia, etc. The major cause for hydroxykynurenines's neurotoxicity is the oxidative stress induced by the reactive oxygen species (ROS), the by-products of L-3-hydroxykynurenine (L-3HOK) and 3-hydroxyanthranilic acid (3HAA) oxidative self-dimerization. 2-aminophenol (2AP), a structural precursor of L-3HOK and 3HAA, undergoes the oxidative conjugation to form 2-aminophenoxazinone. Read More

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December 2018
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High-efficiency freezing-induced loading of inorganic nanoparticles and proteins into micron- and submicron-sized porous particles.

Sci Rep 2018 Dec 10;8(1):17763. Epub 2018 Dec 10.

Skolkovo Institute of Science and Technology, Moscow, 143026, Russia.

We demonstrate a novel approach to the controlled loading of inorganic nanoparticles and proteins into submicron- and micron-sized porous particles. The approach is based on freezing/thawing cycles, which lead to high loading densities. The process was tested for the inclusion of Au, magnetite nanoparticles, and bovine serum albumin in biocompatible vaterite carriers of micron and submicron sizes. Read More

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December 2018

Frequency-tunable toughening in a polymer-metal-ceramic stack using an interfacial molecular nanolayer.

Nat Commun 2018 Dec 7;9(1):5249. Epub 2018 Dec 7.

Materials Science and Engineering Department, Rensselaer Polytechnic Institute, Troy, NY, 12180, USA.

Interfacial toughening in composite materials is reasonably well understood for static loading, but little is known for cyclic loading. Here, we demonstrate that introducing an interfacial molecular nanolayer at the metal-ceramic interface of a layered polymer-metal-ceramic stack triples the fracture energy for ~75-300 Hz loading, yielding 40% higher values than the static-loading fracture energy. We show that this unexpected frequency-dependent toughening is underpinned by nanolayer-induced interface strengthening, which facilitates load transfer to, and plasticity in, the polymer layer. Read More

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December 2018

Efficient oxygen evolution electrocatalysis in acid by a perovskite with face-sharing IrO octahedral dimers.

Nat Commun 2018 12 7;9(1):5236. Epub 2018 Dec 7.

State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, 130012, Changchun, People's Republic of China.

The widespread use of proton exchange membrane water electrolysis requires the development of more efficient electrocatalysts containing reduced amounts of expensive iridium for the oxygen evolution reaction (OER). Here we present the identification of 6H-phase SrIrO perovskite (6H-SrIrO) as a highly active electrocatalyst with good structural and catalytic stability for OER in acid. 6H-SrIrO contains 27. Read More

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December 2018
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Materials genomics methods for high-throughput construction of COFs and targeted synthesis.

Nat Commun 2018 Dec 10;9(1):5274. Epub 2018 Dec 10.

State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, 100029, China.

Materials genomics represents a research mode for materials development, for which reliable methods for efficient materials construction are essential. Here we present a methodology for high-throughput construction of covalent organic frameworks (COFs) based on materials genomics strategy, in which a gene partition method of genetic structural units (GSUs) with reactive sites and quasi-reactive assembly algorithms (QReaxAA) for structure generation were proposed by mimicking the natural growth processes of COFs, leading to a library of 130 GSUs and a database of ~470,000 materials containing structures with 10 unreported topologies as well as the existing COFs. As a proof-of-concept example, two generated 3D-COFs with ffc topology and two 2D-COFs with existing topologies were successfully synthesized. Read More

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December 2018

3D tribo-nanoprinting using triboreactive materials.

Nanotechnology 2018 Dec 7. Epub 2018 Dec 7.

University of Leeds, Leeds, UNITED KINGDOM OF GREAT BRITAIN AND NORTHERN IRELAND.

Tribology: the science of friction, wear and lubrication has never been associated in a positive way with the ability to manufacture at the nanoscale. Triboreactivity, when the contact between two surfaces promotes a chemical reaction, has been harnessed in this study to create highly tenacious nano-features. The reported 3D tribo-nanoprinting methodology has been demonstrated for organic and inorganic fluids on steel and silicon substrates and is adaptable through the interface tribology. Read More

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December 2018

Analysis of the GC-MS of volatile compounds and the phytochemical profile and antioxidant activities of some Bulgarian medicinal plants.

Z Naturforsch C 2018 Dec 8. Epub 2018 Dec 8.

Department of Catering and Tourism, University of Food Technologies, Plovdiv, Bulgaria.

The study's objective was to investigate the volatile compounds, assess the total phenolic content and phenolic acids profile, determine the antioxidant capacity and evaluate the anthocyanin and flavonoid contents in stinging nettle (Urtica dioica L.), tansy (Tanacetum vulgare L.), bladder campion (Silene vulgaris (Moench) Garcke) and rosehip fruit (Rosa canina L. Read More

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December 2018

Simultaneous removal of pollutants from water using nanoparticles: A shift from single pollutant control to multiple pollutant control.

Sci Total Environ 2018 Nov 22;656:808-833. Epub 2018 Nov 22.

Department of Chemical Engineering, Faculty of Engineering and the Built Environment, University of Johannesburg, Doornfontein, 2028, Johannesburg, South Africa. Electronic address:

The steady increase in population, coupled with the rapid utilization of resources and continuous development of industry and agriculture has led to excess amounts of wastewater with changes in its composition, texture, complexity and toxicity due to the diverse range of pollutants being present in wastewater. The challenges faced by wastewater treatment today are mainly with the complexity of the wastewater as it complicates treatment processes by requiring a combination of technologies, thus resulting in longer treatment times and higher operational costs. Nanotechnology opens up a novel platform that is free from secondary pollution, inexpensive and an effective way to simultaneously remove multiple pollutants from wastewater. Read More

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November 2018

Air pollution associated epigenetic modifications: Transgenerational inheritance and underlying molecular mechanisms.

Sci Total Environ 2018 Nov 28;656:760-777. Epub 2018 Nov 28.

Department of Molecular Biology, ICMR-National Institute for Research in Environmental Health, Bhopal, India. Electronic address:

Air pollution is one of the leading causes of deaths in Southeast Asian countries including India. Exposure to air pollutants affects vital cellular mechanisms and is intimately linked with the etiology of a number of chronic diseases. Earlier work from our laboratory has shown that airborne particulate matter disturbs the mitochondrial machinery and causes significant damage to the epigenome. Read More

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November 2018

Nutrient sulfur acquisition strategies employed by bacterial pathogens.

Curr Opin Microbiol 2018 Dec 7;47:52-58. Epub 2018 Dec 7.

Department of Microbiology and Molecular Genetics, Michigan State University, East Lansing, MI, USA. Electronic address:

Pathogens have evolved elegant mechanisms to acquire essential nutrients from host environments. Sulfur is a requirement for bacterial growth and inorganic and organic sulfur-containing metabolites are abundant within the host-pathogen interface. A growing body of evidence suggests that pathogens are capable of scavenging both types of sulfur sources to fulfill the nutritional requirement. Read More

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December 2018

Interfacial uploading of luminescent hexamolybdenum cluster units onto amino-decorated silica nanoparticles as new design of nanomaterial for cellular imaging and photodynamic therapy.

J Colloid Interface Sci 2018 Dec 4;538:387-396. Epub 2018 Dec 4.

Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center of RAS, Arbuzov str., 8, 420088 Kazan, Russia.

The present work introduces a facile synthetic route to embed phosphorescent K[{MoI}I] and (nBuN)[{MoI}(CHCOO)] clusters (C) onto silica-water interface of amino-decorated silica nanoparticles (SNs, 60 ± 6 nm). The assembled C-SNs gain in the luminescence intensity, which remains stable within three months after their assembly. High uptake capacity of the clusters (8700 of K[{MoI}I] and 6500 of (nBuN)[{MoI}(CHCOO)] per the each nanoparticle) derives from ionic self-assembly and coordination bonds between the cluster complexes and ionic (amino- and siloxy-) groups at the silica surface. Read More

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December 2018

Do magnetic phosphorus adsorbents used for lake restoration impact on zooplankton community?

Sci Total Environ 2018 Nov 28;656:598-607. Epub 2018 Nov 28.

Departamento de Ecología, Universidad de Granada, 18071 Granada, (Spain); Instituto del Agua, Universidad de Granada, 18071 Granada, (Spain). Electronic address:

Magnetic microparticles (MPs) have been recently proposed as innovative and promising dissolved inorganic phosphorus (DIP) adsorbents. However, before using them in a whole-lake restoration project, it is essential to assess their toxicological effects (direct and indirect) on aquatic biota. In the present study we hypothesized that zooplankton community is affected by MPs used for lake restoration. Read More

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November 2018

Clay based nanocomposites for removal of heavy metals from water: A review.

J Environ Manage 2018 Dec 5;232:803-817. Epub 2018 Dec 5.

Central Road Research Institute-CSIR, New Delhi, India. Electronic address:

The exponential increment in world population, recent industrialization, civilization, agricultural and household activities leads to greater levels of water pollution in terms of organic and inorganic contaminants. However, numerous workers have done research for the removal of these pollutants and various types of clays and/or modified clays have been extensively used for this purpose. But all identified adsorbent materials are not able to remove pollutants after certain concentration and sometimes these contaminants are left as such in environment which may create other environmental issues. Read More

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December 2018

Alcohol dehydrogenase on inorganic powders: Zeta potential and particle agglomeration as main factors determining activity during immobilization.

Colloids Surf B Biointerfaces 2018 Nov 29;175:136-142. Epub 2018 Nov 29.

Technical University of Denmark, DTU Chemical Engineering, Søltofts Plads, Building 229, 2800 Kgs, Lyngby, Denmark. Electronic address:

Alcohol dehydrogenase from Saccharomyces cerevisiae was immobilized on different inorganic support materials, i.e. powders of AlO, SiC, TiO and YSZ-8, by covalent bonding and physical adsorption. Read More

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November 2018

Long-term effects after treatment with platinum compounds, cisplatin and [Pt(O,O'-acac)(γ-acac)(DMS)]: Autophagy activation in rat B50 neuroblastoma cells.

Toxicol Appl Pharmacol 2018 Dec 6. Epub 2018 Dec 6.

Laboratory of Cell Biology and Neurobiology, Department of Biology and Biotechnology "L. Spallanzani", University of Pavia, Italy. Electronic address:

Cisplatin (cisPt), among the best known components of multi-drug front-line therapies used for the treatments of solid tumors, such as the childhood neuroblastoma, acts through DNA linking. Nevertheless, the cisPt effectiveness is compromised by the onset of severe side effects, including neurotoxicity that results in neurodegeneration, cell death, and drug-resistance. In the field of experimental oncology, aimed at overcoming cytotoxicity and chemoresistance, great efforts are devoted to the synthesis of new platinum-based drugs, such as [Pt(O,O'-acac)(γ-acac)(DMS)] (PtAcacDMS), which shows a specific reactivity with sulfur residues of enzymes involved in apoptosis. Read More

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December 2018

Soil pollution and toxicity in an area affected by emissions from a bauxite processing plant and a power plant in Gardanne (southern France).

Ecotoxicol Environ Saf 2018 Dec 4;170:55-61. Epub 2018 Dec 4.

Federico II Naples University, I-80126 Naples, Italy.

Soil pollution and toxicity have been investigated in the Gardanne area (southern France) at a range of sites around a recognized pollution source, a bauxite processing plant (BPP), and a power plant (PP). Soil samples were submitted to inorganic and organic analyses and tested for toxicity in two invertebrate models. Inorganic analysis was based on determining elemental concentrations by ICP-MS, encompassing a total of 26 elements including 13 rare earth elements (REEs), of the soil samples and their leachates after 24 or 48 h in seawater. Read More

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December 2018

Poly(methyl methacrylate) films reinforced with coconut shell lignin fractions to enhance their UV-blocking, antioxidant and thermo-mechanical properties.

Int J Biol Macromol 2018 Dec 4. Epub 2018 Dec 4.

Department of Organic and Inorganic Chemistry, Federal University of Ceara, 60440-900 Fortaleza, CE, Brazil. Electronic address:

Lignin is a high added-value product obtained from agrowastes through organosolv process to yield materials for technological applications. Here, coconut shell organosolv lignin was fractionated using green solvents (acetone and ethanol) and incorporated in poly(methyl methacrylate) (PMMA) films. The non-fractionated (WCSAL) and soluble fractions (ACT-F and EtOH-F) were completely characterized regarding their structures. Read More

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December 2018

Effects of inorganic nanoparticles on liver fibrosis: Optimizing a double-edged sword for therapeutics.

Biochem Pharmacol 2018 Dec 6. Epub 2018 Dec 6.

NUS Graduate School for Integrative Sciences & Engineering, Centre for Life Sciences, National University of Singapore, Singapore; Department of Pharmacy, Faculty of Science, National University of Singapore, Singapore. Electronic address:

Liver fibrosis is a condition of sustained wound healing in response to chronic liver injury caused by various factors such as viral, cholestatic and inflammatory diseases. Despite significant advances in the understanding of the mechanistic details of fibrosis, therapeutic intervention with the use of anti-fibrotic drugs achieved only marginal efficacy. Among which, pharmacokinetics profile of agents leading to off-targeting and suboptimal distribution are the principal limiting factors. Read More

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December 2018

Mixed-charge pseudo-zwitterionic mesoporous silica nanoparticles with low-fouling and reduced cell uptake properties.

Acta Biomater 2018 Dec 6. Epub 2018 Dec 6.

Chemistry in Pharmaceutical Sciences Department, Inorganic and Bioinorganic Chemistry Unit, Universidad Complutense de Madrid. Instituto de Investigación Sanitaria Hospital 12 de Octubre i+12, Plaza Ramón y Cajal s/n, 28040 Madrid, Spain; CIBER Bioengineering, Biomaterials and Nanomedicine, CIBER-BBN, Madrid, Spain.

The design of drug delivery systems needs to consider biocompatibility and host body recognition for an adequate actuation. In this work, mesoporous silica nanoparticles (MSNs) surfaces were successfully modified with two silane molecules to provide mixed-charge brushes (-NH/-PO) and well evaluated in terms of surface properties, low-fouling capability and cell uptake in comparison to PEGylated MSNs. The modification process consists in the simultaneous direct-grafting of hydrolysable short chain amino (aminopropyl silanetriol, APST) and phosphonate-based (trihydroxy-silyl-propyl-methyl-phosphonate, THSPMP) silane molecules able to provide a pseudo-zwitterionic nature under physiological pH conditions. Read More

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December 2018

Nitrogen-cycling microbial community functional potential and enzyme activities in cultured biofilms with response to inorganic nitrogen availability.

J Environ Sci (China) 2019 Feb 3;76:89-99. Epub 2018 Apr 3.

Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China. Electronic address:

Biofilms mediate crucial biochemical processes in aquatic ecosystems. It was hypothesized that eutrophication may promote the growth of biofilms, resulting in larger numbers of functional genes. However, the metabolic activity and the roles of biofilms in N cycling will be affected by ambient inorganic nitrogen availability, not by the abundance of functional genes. Read More

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February 2019
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Dental pulp stem cells in chitosan/gelatin scaffolds for enhanced orofacial bone regeneration.

Dent Mater 2018 Dec 6. Epub 2018 Dec 6.

Department of Materials Science and Technology, University of Crete, Heraklion, Greece; Institute of Electronic Structure and Laser (IESL), Foundation for Research and Technology Hellas (FORTH), Heraklion, Greece. Electronic address:

Objective: Biomimetic chitosan/gelatin (CS/Gel) scaffolds have attracted great interest in tissue engineering of several tissues. However, limited information exists regarding the potential of combining CS/Gel scaffolds with oral cells, such as dental pulp stem cells (DPSCs), to produce customized constructs targeting alveolar/orofacial bone reconstruction, which has been the aim of the present study.

Methods: Two scaffold types, designated as CS/Gel-0. Read More

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December 2018

Migration and transformation of phosphorus in municipal sludge by the hydrothermal treatment and its directional adjustment.

Waste Manag 2018 Nov 10;81:196-201. Epub 2018 Oct 10.

School of Environmental and Chemical Engineering, Shanghai University, No. 99 Shangda Rd., Shanghai 200444, PR China. Electronic address:

Phosphorus is an essential resource for organism growth in nature. In order to recover phosphorus from sludge, the effects of temperature, time, pH and CaO on the migration and transformation of phosphorus during hydrothermal treatment were investigated. The results demonstrated that approximately 30% of total phosphorus (TP) existed in the hydrothermal supernatant in the temperature range of 200-260 °C. Read More

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November 2018

Characterization and alkaline pretreatment of rice husk varieties in Uganda for potential utilization as precursors in the production of activated carbon and other value-added products.

Waste Manag 2018 Nov 6;81:104-116. Epub 2018 Oct 6.

Department of Chemical Engineering, KTH Royal Institute of Technology, SE 100 44 Stockholm, Sweden.

In this study, 13 rice husk (RH) varieties from 4 agro-ecological zones in Uganda were characterized, NaOH-pretreated, and evaluated for their potential utilization as precursors for production of bio-oil, ash, char, and activated carbon for selected applications. RH varieties were characterized through particle size analysis, bulk density, proximate and ultimate analyses, specific surface area, pore volume, as well as lignocellulosic and inorganic compositions. Selected RH varieties were subsequently pretreated at NaOH concentrations of 1-4%w/v, using pretreatment ratios of 5 g RH: 40 mL NaOH. Read More

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November 2018

Basic fibroblast growth factor regulates phosphate/pyrophosphate regulatory genes in stem cells isolated from human exfoliated deciduous teeth.

Stem Cell Res Ther 2018 Dec 10;9(1):345. Epub 2018 Dec 10.

Center of Excellence for Regenerative Dentistry, Chulalongkorn University, Bangkok, 10330, Thailand.

Background: Basic fibroblast growth factor (bFGF) regulates maintenance of stemness and modulation of osteo/odontogenic differentiation and mineralization in stem cells from human exfoliated deciduous teeth (SHEDs). Mineralization in the bones and teeth is in part controlled by pericellular levels of inorganic phosphate (P), a component of hydroxyapatite, and inorganic pyrophosphate (PP), an inhibitor of mineralization. The progressive ankylosis protein (gene ANKH; protein ANKH) and ectonucleotide pyrophosphatase phosphodiesterase 1 (ENPP1/ENPP1) increase PP and inhibit mineralization, while tissue-nonspecific alkaline phosphatase (ALPL; TNAP) is a critical pro-mineralization enzyme that hydrolyzes PP. Read More

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December 2018

Parity violating energy difference for mirror conformers of DABCO linker between two M cations (M = Zn, Cd, and Hg).

J Chem Phys 2018 Dec;149(21):214302

Nikolaev Institute of Inorganic Chemistry, Siberian Branch of Russian Academy of Sciences, Lavrentyev Ave., 3, RU-630090 Novosibirsk, Russian Federation.

We have studied the potential energy surface of cations (M = Zn, Cd, and Hg), which are considered as a model for the DABCO linker in metal-organic frameworks, a new prospective class of materials. Relativistic four-component and two-component calculations of parity violating energy difference (PVED) for twisted isomers of cations have been performed. The right-twisted conformers of are more stable than the left-twisted ones. Read More

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December 2018

Markovnikov-Selective Co(I)-Catalyzed Hydroboration of Vinylarenes and Carbonyl Compounds.

Org Lett 2018 Dec 10. Epub 2018 Dec 10.

Department of Inorganic and Physical Chemistry , Indian Institute of Science , Bangalore 560012 , India.

An NHC-supported Co(I) catalyst has been developed for selective Markovnikov hydroboration of vinylarenes under mild reaction conditions. The hydroboration allows highly selective synthesis of a wide range of secondary and tertiary alkyl boronates in excellent yields. Our protocol also enables hydroboration of aldehydes and ketones with diverse functional groups to access the corresponding borate esters. Read More

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December 2018

New Assembly-Free Bulk Layered Inorganic Vertical Heterostructures with Infrared and Optical Bandgaps.

Nano Lett 2018 Dec 10. Epub 2018 Dec 10.

In principle, a nearly endless number of unique van der Waals heterostructures can be created through the vertical stacking of two-dimensional (2D) materials, resulting in unprecedented potential for material design. However, this widely employed synthetic method for generating van der Waals heterostructures is slow, imprecise, and prone to introducing interlayer contaminants when compared with synthesis methods that are scalable to industrially relevant scales. Herein, we study the properties of a new class of layered bulk inorganic materials that has recently been reported, which we call assembly-free bulk layered inorganic heterostructures, wherein the individual layers are of dissimilar chemical composition, distinguishing them from commonly studied layered materials. Read More

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December 2018